Volume 26, 2020
|Number of page(s)||28|
|Published online||30 June 2020|
Calibrations for minimal networks in a covering space setting
Institut für Mathematik, Karl-Franzens-Universität,
2 Dipartimento di Matematica, Università di Pisa, Largo Bruno Pontecorvo 5, 56127 Pisa, Italy.
* Corresponding author: firstname.lastname@example.org
Accepted: 10 April 2019
In this paper, we define a notion of calibration for an approach to the classical Steiner problem in a covering space setting and we give some explicit examples. Moreover, we introduce the notion of calibration in families: the idea is to divide the set of competitors in a suitable way, defining an appropriate (and weaker) notion of calibration. Then, calibrating the candidate minimizers in each family and comparing their perimeter, it is possible to find the minimizers of the minimization problem. Thanks to this procedure we prove the minimality of the Steiner configurations spanning the vertices of a regular hexagon and of a regular pentagon.
Mathematics Subject Classification: 49Q20 / 49Q05 / 57M10
Key words: Minimal partitions / Steiner problem / covering spaces / calibrations
© EDP Sciences, SMAI 2020
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